Mechanics of Structures

CE3I

22303

Multiple Choice Questions (MCQs)
1   The axis passing through the center of gravity of a section is called
    (A)   Centroidal axis
    (B)   X-X axis
    (C)   Y-Y axis
    (D)   All of the above
[showhide type=”button1″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option A [/showhide]
2   Moment of inertia is a________ moment of area
    (A)   First
    (B)   Second
    (C)   Infinite
    (D)   Zero
[showhide type=”button2″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option B [/showhide]
3   Radius of gyration is expressed as.
    (A)   N
    (B)   kN
    (C)   mm
    (D)   kN-m
[showhide type=”button3″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option C [/showhide]
4   Moment of inertia of quarter circle is
    (A)   0.11 R4
    (B)   0.055 R4
    (C)   0.55 R2
    (D)   0.011 R4
[showhide type=”button4″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option B [/showhide]
5   The moment of inertia of plane section about any axis parallel to the centroidal axis is equal to the moment of inertia of the section about the centroidal axis plus the product of the area of the section and the square of the distance between the two axes is a
    (A)   Perpendicular axis theorem
    (B)   Polar axis theorem
    (C)   Parallel axis theorem
    (D)   All the above
[showhide type=”button5″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option C [/showhide]
6   Polar moment of inertia is expressed as (Ixx=moment of inertia about X-X axis, Iyy = moment of inertia about Y-Y axis)
    (A)   Ixx+Iyy
    (B)   Ixx+Izz
    (C)   Ixx-Iyy
    (D)   Ixx/Iyy
[showhide type=”button6″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option A [/showhide]
7   Calculate moment of inertia of a circular section having 50 mm diameter
    (A)   306.79×103 mm4
    (B)   308.7×104 mm4
    (C)   311.20×104 mm4
    (D)   364.20×104 mm4
[showhide type=”button7″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option A [/showhide]
8   Stress is a
    (A)   External force
    (B)   Internal resisting force
    (C)   Axial force
    (D)   Radial force
[showhide type=”button8″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option B [/showhide]
9   When tensile stress is applied axially on a circular rod its
    (A)   Diameter decreases and length also decreases
    (B)   Diameter decreases and length increases
    (C)   Diameter increases and volume decreases
    (D)   Length decreases
[showhide type=”button9″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option B [/showhide]
10   Tensile strain is
    (A)   Increase in length /Original length
    (B)   Decrease in length/ Original length
    (C)   Change in volume / Original volume
    (D)   All of the above
[showhide type=”button10″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option A [/showhide]
11   Hooke’s law is applicable within
    (A)   Elastic limit
    (B)   Plastic limit
    (C)   Fracture point
    (D)   Ultimate strength
[showhide type=”button11″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option A [/showhide]
12   Modulus of rigidity is
    (A)   Tensile stress / Tensile strain
    (B)   Shear stress / Shear strain
    (C)   Tensile stress / Shear strain
    (D)   Shear stress / Tensile strain
[showhide type=”button12″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option B [/showhide]
13   A rod, 120cm long and diameter 3 cm is subjected to an axial pull of 18kN. The stress in N/mm2 is
    (A)   22.57
    (B)   23.47
    (C)   24.57
    (D)   25.47
[showhide type=”button13″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option D [/showhide]
14   Which of the following is not a basic type of strain
    (A)   Compressive strain
    (B)   Shear strain
    (C)   Area strain
    (D)   Volume strain
[showhide type=”button14″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option C [/showhide]
15   Double shear is a (A- Area of cross section, P- Load)
    (A)   P/2A
    (B)   2P/A
    (C)   2P/2A
    (D)   P/A
[showhide type=”button15″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option A [/showhide]
16   Bulk modulus of elasticity is
    (A)   Tensile stress/Tensile strain
    (B)   Shear stress / Shear strain
    (C)   Tensile stress/ Shear strain
    (D)   Nominal stress on each face of cube / volumetric strain
[showhide type=”button16″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option D [/showhide]
17   Poisson’s ratio is
    (A)   Lateral strain to linear strain
    (B)   Shear strain to lateral strain
    (C)   Linear strain to lateral strain
    (D)   Lateral strain to volumetric strain
[showhide type=”button17″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option A [/showhide]
18   Modulus of elasticity is
    (A)   Strain /stress
    (B)   stress/strain
    (C)   Stress-strain
    (D)   Stress x strain
[showhide type=”button18″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option B [/showhide]
19   The relationship between modulus of elasticity (E), Bulk modulus (K) and Poisson’s ratio (u) is given by
    (A)   E=2K(1-u)
    (B)   E=3K(1-2u)
    (C)   E=2K(1-3u)
    (D)   E=3K(1-u)
[showhide type=”button19″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option B [/showhide]
20   The deformation per unit length is called as
    (A)   Strain
    (B)   Stress
    (C)   Elasticity
    (D)   Plasticity
[showhide type=”button20″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option A [/showhide]
21   Which of the following material is more elastic
    (A)   Rubber
    (B)   Glass
    (C)   Steel
    (D)   Wood
[showhide type=”button21″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option C [/showhide]
22   Young modulus of certain metal is 120kN/mm2, if Poisson’s ratio is 0.29. Find the value of modulus of rigidity
    (A)   44.51 kN/mm2
    (B)   46.512 kN/mm2
    (C)   40.12 kN/mm2
    (D)   47.512 kN/mm2
[showhide type=”button22″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option B [/showhide]
23   % elongation of bar is calculated as
    (A)   (Increase in length/ Original length) x 100
    (B)   (Increase in length/ Decrease in length) x 100
    (C)   (Original length/ Increase in length) x 100
    (D)   (Original length/ Decrease in length) x 100
[showhide type=”button23″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option A [/showhide]
24   Find temperature stress if rod is heated through 60⁰, Coefficient of linear expansion=12×102-6/⁰c and E=2.1×105N/mm2
    (A)   128.2 N/mm2
    (B)   151.2 N/mm2
    (C)   204.2 N/mm2
    (D)   32k N/mm2
[showhide type=”button24″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option B [/showhide]
25   A bar of c/s area mm2 is axially pulled by a force ‘P’ kN. If the maximum stress induced in the bar is 30mpa, determine ‘P’.
    (A)   3 kN
    (B)   2 kN
    (C)   0.4 kN
    (D)   6 kN
[showhide type=”button25″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option D [/showhide]
26   Biaxial lateral strain Mpa, determine is
    (A)   ey=1/E(σy-uσx)
    (B)   ey=1/E(uσy-uσx)
    (C)   ey=1/E(uσy-σx)
    (D)   None of the above
[showhide type=”button26″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option A [/showhide]
27   Relation between bulk modulus (K), Poisson’s ratio (u), 27. modulus of rigidity(G), Modulus of elasticity (E) is
    (A)   E=6KG/G=3K
    (B)   E=9KG/G+3K
    (C)   E=KG/9G+3K
    (D)   E=2KG/G+K
[showhide type=”button27″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option B [/showhide]
28   The stress-strain curve for a mild steel is straight line up to
    (A)   Yield point
    (B)   Proportional limit
    (C)   Elastic limit
    (D)   all of the above
[showhide type=”button28″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option B [/showhide]

Back to Top

Back to Civil Engineering Department